Sawing machine



Feb. 23,1926. l 1,574,001

J. J. RGACH S`AWING MACHINE Fued Nov. 25, 1924 2 sheets sheet 2 lil /Egg IIIIIA '11,4'

JOSEP/,1 J, ROQAGH NVENTR 53 ATTORNEY l 38 34 Ol 4/ O atented Feb. 23,1926i.

PATENT F-FCE,

JOSEPH J. ROGCH, OF BRGOKLYN, NEX/V YORK.

SAWING NIACHINE.

Application filed November 255 1924.-.

To all whom t 'may concern:

Be 1t known that l, Josnrri d. Roosen,

citizen of Russia, and resicent ot Brooklyn, in the county or" Kings andState of New York, have invented Acertain new and useful Improvements inSawing Machines, oi' which the following isla. specication.`

My invention relates t sawing machines and has a particular reference tomachines operated by electric power.

The object of my invention is to provide a` sawing machine et a lightand portable type, adapted to be easily clamped against the work andprovide/i with an electric motor for. imparting the necessaryreciprocating motion to the sawing blade. rlhe rotary motion of themotor armature is transmitted to a. shaft with. clutches, alternatelyengaging one et the two pinions in mesh witlr corresponding racks on asliding carriage supporting the saw blade. By automatically controllingthe clutches I obtain a simple and efficient mechanism i'or thereciprocating` motion oi the saw blade.

My invention is more fully described in the accompanying specificationand drawing inwhich- Fig. 1 is an elevation partly in section, Fig. 2 isa planV view, Fig. 3 is an elevation lon the other side, Fig. lV is asectional vien1 of the motor with driving mechanism, Fig.V

5 Ais apartial bottom view ot the mechanism, Fig. 6 is a section on theline 6 6 in F ig. 5. Fig/ 7, is av view of the controlling links, Fig.Sfis-a sectional-view ofV the controlling links with their housing,` andFig. 9 is a front View of the clamp jaws.A

My sawing machine consists of a housing 1 with an electric motor 2attached to the upper side. and with a handle 3 for holding thedevice.rEhe end-brackets l and 5` ot the bearings Grand 7 for a drive shaft 8.Gears 9, 10, 11 and 12 connect the motor armature 13V with theshaft 8;The shaft is passed through the central portion of the housing 1 Y thesides of which are provided with circulanapertures li-tor the shaft andfor pinionslfloosely mounted on the shaft. A collar 16 on the shaftseparates these two pinions. The pinions are in mesh with upper and'lower racks 17; andl. These racks 'are connected with plugs 19 on theends and form `a cage adapted to slide inside of the housing 1. Springbumpers at the end plugs Serial No. 752,137.

20 oi' the housing 1 provide stops for the extreme positions et the cageinside. The bumpers consist of sliding plugs 21 in bushings 22 screwedinto end plates or plugs 20. Springs tend to push the plugs outwards,the latter being retained in their working positions by n'leans etshoulders 21 in an engagen'ient with inner recesses in the bushings 22.

@ne side oi" the housing 1 is provided with hnigitudinal slots 26. Studs27 pass through these slots andare screwed intothe end plugs or plates19 and are provided with outside shoulders 23 and threaded extensions 29with nuts 3l). n. saw blade 31 is litted over these studs and is clampedwith nuts 30.

The pinions 15 are provided with clutch teeth 31 on their sides, adaptedto mesh with corresponding clutch teeth 32 on the sides oit clutchbushings or collars These collars slide on the shaft 8 and on keys 31thereby being forced to rotate with the shalt.

The collars 33 can be shifted in and` out oi engagement with pinions 15by means of shifting forks 31- at-tached to a common shifting bar 35, sothat if one collar is shifted into the engagement with the correspondingpinion, the other pinion is at the same time disengaged.

The shifting bar 35 is slidine'ly i'itted into a bridge 36 attached tothe lower side of the housing l. Sluiting levers 3T are pivotallymounted on the bridge with pins 33. A pin 39 is attached to the end etone lever, the other lever being provided 'with an elongated aperture'for this pin. rl`his pin forms a hinged connection between the ends ofthe levers, which are placed in a recess in the shitting bar 35, so thatthis bar may'be moved one way or the other by turning the levers on pins38. rl`he free ends ot levers are connectedtogether by means ot a springl2. A roller Ll3is mounted on the end of the pin 39.

The lower side ot the housing 1 is pro vided with an open slot intowhich the roller 1t-3 extends almost coming in a contact with the bachside of the lower rack 18. rihis rack` is provided with cam shaped ribsL15 adapted to engage the rollers 43.

The shifting bar is retained in .its extreme positions by means oi asteel ball l16 adapted to slide in a hole 1-7. A. spring C13 back oi theball tends to keep the ball in an llO 'lio

" The housing 1 is provided ivith a holding The clamping device isplaced over t at yachnieiit consisting of a flat tubular frame 51pivotally supported on a stud 52, this Ystud being attached to the sideof the housing 1. The front end of the lframe 51 is provided with aadjustable jaiv 53 which can swing on a bolt 54 and can be clamped inany desired position by means of a bolt 55 passing through a slot- 56 inan adjustable bracket 57. This bracket is pivotally mounted on a bolt 58attached to a stationary bracket or lug 59 on the frame 51. The bracket57 can be clamped in any position by means of a bolt 60 passing througha slot 61 inthe adjustable bracket 57 and screwed into the lug 59.`llVith this arrangement the adjustable jaw 53 can be clamped in anyposition to suit the shape of the work 62.

A sliding jaw 63 is placed inside of the frame 51 and is provided withrack teeth 64 on the upper edge. These teeth are in an engagement With apinion 65 on a shaft 66, provided Wit-h a tightening handle 67. y Theshaft 66 is journaled in the sides of the housing 63, formed on theupper side of the frame'l.

A guiding frame 69 is attached to the housing 1. It has a section of apartly closed channel adapted to engage the head ofa bolt 70 screivedinto the side of the frame 51.

V-With the swinging of the holding frame.

around the bolt 52 thev bolt 70 slides in the slot of the guiding frame,thereby maintaining the proper alignment between the hous- `ing 1 andthe clamping frame 51.

The operation of my device is as follows. he work 62, and the movablejaiv 63 i drawn tightly over it by turning the handle 67. The saw isthen placed over the Work and the motor started'by closing the syvitch.7 1.

V The rotation of the motor shaft is transmitted to the saw shaft 8 bymeans of train"` of gears 9, 10, 11 and 12. One of the pinions 15 turnson the shaft, but the other rotates with the shaft, being connectedthrough the clutch member 33, the clutch teeth being in mesh iviththeteeth on the pinion 15. rlhe pinion, being in mesh With the rack 17moves the sliding member, formed of tivoracks 17 and 18 and end plates19, therebj.7

, moving the sav.y over the Work 62.

vthat it can be made light and portable, c

1,574,ooi

cause them to snap in theopposite direction, thereby rapidly shiftingthe shifting member 35, forks 34 and the clutches 33, so that the firstpinion becomes disengaged and the other engaged. The rack 18 becomes nowengaged, and the sliding member With the saw ivill move in the oppositedirection, the change of engagement taking place again at the end of thetravel.

The sliding member, accordingly, with the sav! Will rapidly move backand forth, causing the sar.7 blade to out the ivork 62. The pressure onthe saw an be controlled by turning the frame 1 on the pivot 52 by meansof the handle 3.

important advantages of my device are be used to operate any kind ofWork, also that it keeps itself properly aligned in relation to theWork.

l claim as my invention: l 1. In a sawing machine, the combination witha housing, a sliding member in said housing7 slots in the side of saidhousing, Vstuds passing through said slots and attached to said slidingmember, a savvY lade attachedto said studs, an electric motor on saidhousing, shaft passing transversely through said housing,

a plurality of gears between said motor and sait shaft, racks on theupper anden the loiver sides of said sliding member, pinions rotativelymounted on said shaft and adapted to engagesaid racks, clutches on said.'shaft adapted tov enga` Ae one or the other of said pinions, a shiftingfork adapted to operate said c.liitclies,' a shifting member Vfor saidfork, and cfm membei'sgon said` sliding member, said e memoers beingadapted to operate 'said shi 'ting member and said fork.

2. ln a sawing machine, the combination ivith'a housing, a slidingmember in said housing, a saw blade attached to said sliding member, anelectric motor on said housing, a shaft passing transversely throughsaid housing, an operative connection betiveen said shaft and saidmotor, pinions onV said shaft, racks on the upper and onthe lower sidesof said sliding member adapted to be engaged by said pinions, clutcheson said shaft Vadapted to alternately engage said pinions, a shiftingmember for said clutches, means to operate said shifting member fromsaid sliding member, and means to accelerate the movement of saidshifting member for the extreme positions of said sliding member. y

Signed at Brooklyn in the county of ings and State of N ew York this10th day of November A. D. 1924. y

JOSEPH J. ROGACH.

